TWI469022B - Capacitive touchscreen system and method for detecting touch on capacitive touchscreen system - Google Patents
Capacitive touchscreen system and method for detecting touch on capacitive touchscreen system Download PDFInfo
- Publication number
- TWI469022B TWI469022B TW100115199A TW100115199A TWI469022B TW I469022 B TWI469022 B TW I469022B TW 100115199 A TW100115199 A TW 100115199A TW 100115199 A TW100115199 A TW 100115199A TW I469022 B TWI469022 B TW I469022B
- Authority
- TW
- Taiwan
- Prior art keywords
- drive
- traces
- touch screen
- sensing circuits
- sense
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
- Electronic Switches (AREA)
- User Interface Of Digital Computer (AREA)
Description
本文中所描述之本發明的各種實施例大體上係關於電容性感測輸入器件的領域,且更特定言之係關於在下伏有LCD顯示器或其他類型之影像顯示器的觸控式螢幕中具有特定有效應用的多同時或近同時觸摸互電容量測或感測系統、器件、組件及方法。 The various embodiments of the invention described herein are generally in the field of capacitive sensing input devices, and more particularly in relation to touch screens having an LCD display or other type of image display underneath. Multiple simultaneous or near simultaneous touch mutual capacitance measurement or sensing systems, devices, components, and methods.
此專利申請案將Vitali Souchkov在2010年6月2日申請之題為「Capacitive Touchscreen System With Multiplexers」的美國專利申請案第12/792,670號以全文引用的方式併入本文中。 U.S. Patent Application Serial No. 12/792,670, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in the entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire entire all
當前在大多數觸控板及觸控式螢幕器件中使用兩種主要的電容性感測及量測技術。第一種此技術為自電容。由SYNAPTICSTM所製造之許多器件使用自電容量測技術,如諸如CYPRESS PSOC.TM之積體電路(IC)器件係如此。自電容涉及使用諸如Bisset等人之日期為1996年8月6日之題為「Touch Pad Driven Handheld Computing Device」的美國專利第5,543,588號中所描述之技術的技術來量測一系列電極襯墊之自電容。 Two major capacitive sensing and measurement techniques are currently used in most touchpad and touchscreen devices. The first such technique is self-capacitance. Used by many devices being fabricated from SYNAPTICS TM capacitance measurement techniques, such as devices based PSOC. TM of integrated circuit (IC) so as CYPRESS. The self-capacitance is directed to measuring a series of electrode pads using techniques such as those described in U.S. Patent No. 5,543,588, the entire disclosure of which is incorporated herein by reference. Self capacitance.
可經由偵測在保持於給定電壓下之物件上所積聚之電荷的量(Q=CV)來量測自電容。通常藉由將已知電壓施加至電極且接著使用電路量測流至彼同一電極之電荷的量來量測自電容。當外部物件接近該電極時,額外電荷被吸引至 該電極。結果,該電極之自電容增加。許多觸控式感測器經組態以使得接地物件為手指。人體對於電場消失之表面本質上為電容器,且通常具有約100pF的電容。 The self capacitance can be measured by detecting the amount of charge (Q = CV) accumulated on the object held at a given voltage. The self capacitance is typically measured by applying a known voltage to the electrodes and then using a circuit to measure the amount of charge flowing to the same electrode. When the external object approaches the electrode, the extra charge is attracted to The electrode. As a result, the self-capacitance of the electrode increases. Many touch sensors are configured such that the grounded object is a finger. The surface of the human body for the disappearance of the electric field is essentially a capacitor and typically has a capacitance of about 100 pF.
自電容觸控板中之電極通常排列成列及行。藉由掃描第一列及接著掃描行,可判定由(例如)手指之存在所誘發之個別擾動的位置。然而,為了實現在觸控板中之準確的多觸摸量測,可能需要同時量測若干手指觸摸。在此狀況下,用於自電容量測之列及行技術可導致不確定結果。 The electrodes in a self-capacitive touch panel are typically arranged in columns and rows. By scanning the first column and then the scan line, the location of the individual disturbances induced by, for example, the presence of a finger can be determined. However, in order to achieve accurate multi-touch measurements in the touchpad, it may be necessary to measure several finger touches simultaneously. In this case, the column and row techniques used for self-capacitance measurements can lead to uncertain results.
可在自電容系統中減小電極之數目的一種方式為藉由以鋸齒圖案交錯電極。此交錯產生藉由有限數目個鄰近電極感測手指的較大區,從而允許更好的內插及因此較少的電極。此等圖案在一維感測器(諸如,在IPOD點選式選盤中所使用的彼等感測器)中可為特別有效的。參見(例如)Sinclair等人之日期為2005年4月12日之題為「Capacitance touch slider」的美國專利第6,879,930號。 One way in which the number of electrodes can be reduced in a self-capacitance system is by staggering the electrodes in a sawtooth pattern. This interleaving produces a larger area of the finger that is sensed by a finite number of adjacent electrodes, allowing for better interpolation and therefore fewer electrodes. Such patterns may be particularly effective in one-dimensional sensors, such as those used in IPOD point selection trays. See, for example, U.S. Patent No. 6,879,930 to Sinclair et al., entitled "Capacitance touch slider", dated April 12, 2005.
在觸控板及觸控式螢幕器件中所使用之第二種主要的電容性感測及量測技術為互電容技術,其中使用電極之交叉網格來執行量測。參見(例如)Gerpheide之日期為1999年1月19日之題為「Methods and Apparatus for Data Input」的美國專利第5,861,875號。在由CIRQUETM所製造之觸控板器件中使用互電容技術。與量測單一導體之電容且該電容可受接近該導體之其他物件影響的自電容量測相對比,在互電容量測中,量測兩個導體之間的電容。 The second major capacitive sensing and metrology technique used in touchpads and touchscreen devices is the mutual capacitance technique, in which the cross grid of electrodes is used to perform the measurement. See, for example, U.S. Patent No. 5,861,875, entitled "Methods and Apparatus for Data Input," by Gerpheide, dated Jan. 19, 1999. Technique using mutual capacitance touch panel device being fabricated in the CIRQUE TM. In contrast to measuring the capacitance of a single conductor and the capacitance can be measured by self-capacitance, which is affected by other objects close to the conductor, in the mutual capacitance measurement, the capacitance between the two conductors is measured.
在一些互電容量測系統中,將感測電極陣列安置於基板 之第一側上,且將驅動電極陣列安置於該基板之與該第一側相對的第二側上,將該驅動電極陣列中之一行或一列電極驅動至特定電壓,量測對該感測電極陣列之單一列(或行)的互電容,且判定單一列-行相交點處之電容。藉由掃描所有列及行,可針對網格中之所有節點產生電容量測圖。當使用者之手指或其他導電物件接近給定網格點時,源自該網格點或靠近該網格點之電場線中之一些被偏轉,藉此減小該網格點處之兩個電極的互電容。因為每一量測僅探測單一網格相交點,所以不會如在一些自電容系統之狀況下隨多個觸摸而出現量測不定性。此外,有可能藉由IC上之僅2n個接腳來量測具有n×n個相交點的網格。 In some mutual capacitance measuring systems, the sensing electrode array is disposed on a first side of the substrate, and the driving electrode array is disposed on a second side of the substrate opposite to the first side, the driving electrode array One of the rows or columns of electrodes is driven to a particular voltage, the mutual capacitance of a single column (or row) of the array of sense electrodes is measured, and the capacitance at a single column-row intersection is determined. By scanning all columns and rows, a capacitance map can be generated for all nodes in the grid. When a user's finger or other conductive object approaches a given grid point, some of the electric field lines originating from or near the grid point are deflected, thereby reducing the two points at the grid point The mutual capacitance of the electrodes. Since each measurement only detects a single mesh intersection, measurement uncertainty does not occur with multiple touches as in some self-capacitance systems. In addition, it is possible to measure a grid with n × n intersection points by only 2n pins on the IC.
以下情形為熟知的:準確地同時或近同時量測電容性觸控式螢幕上之多個手指觸摸的位置為困難的,且常常不成功。 The following situations are well known: accurately measuring the position of multiple finger touches on a capacitive touch screen simultaneously or nearly simultaneously is difficult and often unsuccessful.
需要一種可用於觸控式螢幕及觸控板應用中之電容性量測系統,其能夠在電容性觸控式螢幕上之多個同時或近同時觸摸之間準確地、可靠地且快速地進行區別。 There is a need for a capacitive measurement system that can be used in touch screen and trackpad applications that can accurately, reliably, and quickly between multiple simultaneous or near simultaneous touches on a capacitive touch screen. the difference.
在一實施例中,提供一種電容性觸控式螢幕系統,其包含:一觸控式螢幕,其包含排列成列或行之第一複數個跡線及排列成相對於該第一複數個電極之該等列或該等行以一角度排列之列或行的第二複數個跡線,互電容存在於該第一複數個跡線與該第二複數個跡線之間於該第一複數個跡線與該第二複數個跡線相交之位置處,此等互電容在存 在接近其之一或多個手指的情況下改變;第一驅動感測電路,此等第一驅動感測電路中之每一者可藉由切換電路可操作地連接至該第一複數個跡線中之一相應者,每一第一驅動感測電路可操作地連接至其相應跡線且連接至一第一放大器,一第一電容器可操作地連接至該第一放大器之一第一負輸入端及一第一輸出端,且連接至一第一比較器,該第一比較器可操作地連接至該第一放大器之該第一輸出端;第二驅動感測電路,此等第二驅動感測電路中之每一者可藉由切換電路可操作地連接至該第二複數個跡線中之一相應者,每一第二驅動感測電路可操作地連接至其相應跡線及一第二放大器,一第二電容器可操作地連接至該第二放大器之一第二負輸入端及一第二輸出端,且連接至一第二比較器,該第二比較器可操作地連接至該第二放大器之該第二輸出端;及一驅動/感測處理器,其可操作地分別連接至該等第一驅動感測電路及該等第二驅動感測電路,且經組態以進行以下操作:(a)控制該第一複數個第一驅動感測電路驅動該第一複數個跡線中之至少一些,且控制該第二複數個第二驅動感測電路經由該第二複數個跡線感測該等互電容中之至少一些,及(b)控制該等第二驅動感測電路驅動該第二複數個跡線中之至少一些,且控制該等第一驅動感測電路經由該第一複數個跡線感測該等互電容中之至少一些。 In one embodiment, a capacitive touch screen system is provided, comprising: a touch screen comprising a first plurality of traces arranged in columns or rows and arranged to be aligned with respect to the first plurality of electrodes a second plurality of traces of the columns or rows of the columns or rows, the mutual capacitance being present between the first plurality of traces and the second plurality of traces at the first plurality Where the traces intersect the second plurality of traces, the mutual capacitance is present Changing in proximity to one or more of the fingers; a first drive sensing circuit, each of the first drive sensing circuits being operatively coupled to the first plurality of tracks by a switching circuit Corresponding to one of the lines, each first drive sensing circuit is operatively coupled to its respective trace and to a first amplifier, a first capacitor operatively coupled to one of the first amplifiers An input terminal and a first output terminal are coupled to a first comparator operatively coupled to the first output terminal of the first amplifier; a second drive sensing circuit, the second Each of the drive sensing circuits is operatively coupled to a respective one of the second plurality of traces by a switching circuit, each second drive sensing circuit being operatively coupled to its respective trace and a second amplifier operatively coupled to one of the second negative input and the second output of the second amplifier and coupled to a second comparator operatively coupled To the second output of the second amplifier; a drive/sense processor operatively coupled to the first drive sense circuits and the second drive sense circuits, respectively, and configured to: (a) control the first plurality The first driving sensing circuit drives at least some of the first plurality of traces, and controls the second plurality of second driving sensing circuits to sense at least one of the mutual capacitances via the second plurality of traces And (b) controlling the second drive sensing circuits to drive at least some of the second plurality of traces, and controlling the first drive sensing circuits to sense the first plurality of traces via the first plurality of traces At least some of the mutual capacitance.
在另一實施例中,提供一種偵測一電容性觸控式螢幕系統上之觸摸的方法,該電容性觸控式螢幕系統包含:一觸 控式螢幕,其包含排列成列或行之第一複數個跡線及排列成相對於該第一複數個電極之該等列或該等行以一角度排列之列或行的第二複數個跡線,互電容存在於該第一複數個跡線與該第二複數個跡線之間於該第一複數個跡線與該第二複數個跡線相交之位置處,此等互電容在存在接近其之一或多個手指的情況下改變;第一驅動感測電路,此等第一驅動感測電路中之每一者可藉由切換電路可操作地連接至該第一複數個跡線中之一相應者,每一第一驅動感測電路可操作地連接至其相應跡線且連接至一第一放大器,一第一電容器可操作地連接至該第一放大器之一第一負輸入端及一第一輸出端,且連接至一第一比較器,該第一比較器可操作地連接至該第一放大器之該第一輸出端;第二驅動感測電路,此等第二驅動感測電路中之每一者可藉由切換電路可操作地連接至該第二複數個跡線中之一相應者,每一第二驅動感測電路可操作地連接至其相應跡線及一第二放大器,一第二電容器可操作地連接至該第二放大器之一第二負輸入端及一第二輸出端,且連接至一第二比較器,該第二比較器可操作地連接至該第二放大器之該第二輸出端;及一驅動/感測處理器,其可操作地分別連接至該等第一驅動感測電路及該等第二驅動感測電路,且經組態以進行以下操作:(i)控制該等第一驅動感測電路驅動該第一複數個跡線中之至少一些,且控制該等第二驅動感測電路經由該第二複數個跡線感測該等互電容中之至少一些,及(ii)控制該等第二驅動感測電路驅動該第二複數個 跡線中之至少一些,且控制該等第一驅動感測電路經由該第一複數個跡線感測該等互電容中之至少一些,該方法包含:經由該等第一驅動感測電路驅動該第一複數個跡線;經由該第二複數個跡線及該等第二驅動感測電路感測該等互電容;經由該等第二驅動感測電路驅動該第二複數個跡線;經由該第一複數個跡線及該等第一驅動感測電路感測該等互電容;及以超過預定電壓臨限值之所感測互電容為基礎來偵測該觸控式螢幕上之一或多個觸摸的位置。 In another embodiment, a method for detecting a touch on a capacitive touch screen system is provided, the capacitive touch screen system comprising: a touch a control screen comprising a first plurality of traces arranged in columns or rows and a second plurality of columns or rows arranged in an array with respect to the first plurality of electrodes or at an angle to the rows a trace, a mutual capacitance exists between the first plurality of traces and the second plurality of traces at a position where the first plurality of traces intersect the second plurality of traces, and the mutual capacitance is Changing in the presence of one or more of the fingers; a first drive sensing circuit, each of the first drive sensing circuits being operatively coupled to the first plurality of tracks by a switching circuit Corresponding to one of the lines, each first drive sensing circuit is operatively coupled to its respective trace and to a first amplifier, a first capacitor operatively coupled to one of the first amplifiers An input terminal and a first output terminal are coupled to a first comparator operatively coupled to the first output terminal of the first amplifier; a second drive sensing circuit, the second Each of the drive sensing circuits is operatively operable by the switching circuit Connected to one of the second plurality of traces, each second drive sensing circuit is operatively coupled to its respective trace and a second amplifier, a second capacitor operatively coupled to the second a second negative input terminal and a second output terminal of the amplifier, and connected to a second comparator operatively connected to the second output end of the second amplifier; and a driving/sensing Measuring processor operatively coupled to the first drive sensing circuits and the second drive sensing circuits, respectively, and configured to: (i) control the first drive sensing circuits Driving at least some of the first plurality of traces, and controlling the second drive sensing circuits to sense at least some of the mutual capacitances via the second plurality of traces, and (ii) controlling the Two drive sensing circuits drive the second plurality At least some of the traces, and controlling the first drive sensing circuits to sense at least some of the mutual capacitances via the first plurality of traces, the method comprising: driving via the first drive sensing circuits The first plurality of traces; sensing the mutual capacitance via the second plurality of traces and the second drive sensing circuits; driving the second plurality of traces via the second drive sensing circuits; Sensing the mutual capacitances via the first plurality of traces and the first driving sensing circuits; and detecting one of the touch screens based on the sensed mutual capacitance exceeding a predetermined voltage threshold Or the location of multiple touches.
在本文中揭示其他實施例,且對於熟習此項技術者而言,在已閱讀且理解說明書及其圖式之後,該等其他實施例將變得顯而易見。 Other embodiments are disclosed herein, and will be apparent to those skilled in the <RTIgt;
本發明之各種實施例的不同態樣將自以下說明書、圖式及申請專利範圍而變得顯而易見。 Different aspects of the various embodiments of the invention will be apparent from the description, drawings and claims.
該等圖式未必按比例繪製。相似數字遍及圖式指代相似部分或步驟。 The drawings are not necessarily to scale. Like numbers refer to like parts or steps throughout the drawings.
如圖1中所說明,電容性觸控式螢幕系統110通常由以下各者組成:下伏LCD或OLED顯示器112、上覆觸敏式面板或觸控式螢幕90、安置於觸控式螢幕90之上之保護性蓋板或介電板95,及觸控式螢幕控制器、微處理器、特殊應用積體電路(「ASIC」)或CPU 100。應注意,不同於LCD或OLED之影像顯示器可安置於顯示器112之下。 As illustrated in FIG. 1 , the capacitive touch screen system 110 is generally composed of an underlying LCD or OLED display 112 , an overlying touch sensitive panel or a touch screen 90 , and a touch screen 90 . A protective cover or dielectric board 95, and a touch screen controller, a microprocessor, an application specific integrated circuit ("ASIC") or a CPU 100. It should be noted that an image display other than an LCD or OLED can be disposed under the display 112.
圖2展示觸控式螢幕控制器100之一實施例之方塊圖。在一實施例中,觸控式螢幕控制器100可為根據本文中所呈 現之教示所修改之Avago TechnologiesTM的AMRI-5000 ASIC或晶片100。在一實施例中,觸控式螢幕控制器為經設計以提供具有高準確性螢幕上導覽之觸控式螢幕系統的低功率電容性觸控面板控制器。 2 shows a block diagram of one embodiment of a touch screen controller 100. In one embodiment, the touch screen controller 100 may be presented in accordance with the teachings herein, the modified Avago Technologies TM of AMRI-5000 ASIC 100 or wafer. In one embodiment, the touch screen controller is a low power capacitive touch panel controller designed to provide a touch screen system with high accuracy on-screen navigation.
展示於圖3及圖4中之電容性觸控式螢幕或觸控面板90可藉由將導電材料(諸如,氧化銦錫(ITO))塗覆至介電板之(多個)表面來形成,該介電板通常包含玻璃、塑膠或另一合適的電絕緣且較佳透光之材料且通常以電極網格之形狀來組態。該網格之電容保持電荷,且用手指觸摸該面板呈現至使用者之身體的電路路徑,此引起該電容之改變。 The capacitive touch screen or touch panel 90 shown in FIGS. 3 and 4 can be formed by coating a conductive material such as indium tin oxide (ITO) onto the surface(s) of the dielectric board. The dielectric board typically comprises glass, plastic or another suitable electrically insulating and preferably light transmissive material and is typically configured in the shape of an electrode grid. The capacitance of the grid maintains charge and the finger is touched by the panel to present a circuit path to the user's body, which causes a change in the capacitance.
觸控式螢幕控制器100感測及分析此等電容改變的座標。當將觸控式螢幕90貼附至具有圖形使用者介面之顯示器時,有可能藉由追蹤觸摸座標來進行螢幕上導覽。常常有必要偵測多個觸摸。藉由觸摸之所要解析度來驅動網格之大小。通常,存在額外蓋板95以保護觸控式螢幕90之頂部ITO層,從而形成完整觸控式螢幕解決方案(參見(例如)圖1)。 The touch screen controller 100 senses and analyzes the coordinates of these capacitance changes. When the touch screen 90 is attached to a display having a graphical user interface, it is possible to perform on-screen navigation by tracking the touch coordinates. It is often necessary to detect multiple touches. The size of the grid is driven by the resolution of the touch. Typically, an additional cover plate 95 is present to protect the top ITO layer of the touch screen 90 to form a complete touch screen solution (see, for example, Figure 1).
產生觸控式螢幕90之一種方式為將ITO網格塗覆於介電板或基板之僅一側上。當觸控式螢幕90與顯示器配合時,不需要額外保護性蓋罩。此情形具有如下益處:產生具有改良之透射率(>90%)之較薄顯示系統,從而實現較亮及較輕的手持型器件。觸控式螢幕控制器100之應用包括(但不限於)智慧型電話、攜帶型媒體播放器、行動網際網路器件(MID),及GPS器件。 One way to create the touch screen 90 is to apply an ITO grid to only one side of the dielectric board or substrate. When the touch screen 90 is mated with the display, no additional protective cover is required. This situation has the benefit of producing a thinner display system with improved transmittance (>90%) to achieve a brighter and lighter handheld device. Applications for touch screen controller 100 include, but are not limited to, smart phones, portable media players, mobile internet devices (MIDs), and GPS devices.
現參看圖3及圖4,在一實施例中,觸控式螢幕控制器 100包括類比前端,該類比前端具有連接至觸控式螢幕上之ITO網格的9條感測及驅動信號線以及16條驅動及感測線。觸控式螢幕控制器100將諸如方波、蜿蜒信號(meander signal)或其他合適類型之驅動信號的激勵施加至驅動電極,該激勵可具有選自在約40kHz與約200kHz之間的範圍的頻率。經由互電容將AC信號耦接至感測線。用手指觸摸面板90更改觸摸位置處之電容。觸控式螢幕控制器100可同時解析及追蹤多個觸摸。高的再新率允許主機追蹤快速觸摸及任何額外移動而無可感知的延遲。嵌入式處理器對資料進行濾波,識別觸摸座標且將該等座標報告至主機。嵌入式韌體可經由修補程式載入來更新。當然,涵蓋其他數目條驅動及感測線,諸如,8×12及12×20陣列。 Referring now to Figures 3 and 4, in one embodiment, a touch screen controller The 100 includes an analog front end having nine sense and drive signal lines connected to the ITO grid on the touch screen and 16 drive and sense lines. The touch screen controller 100 applies an excitation such as a square wave, a meander signal, or other suitable type of drive signal to the drive electrode, the excitation having a frequency selected from the range between about 40 kHz and about 200 kHz. . The AC signal is coupled to the sense line via a mutual capacitance. Touch panel 90 with your finger to change the capacitance at the touch location. The touch screen controller 100 can simultaneously analyze and track multiple touches. The high regeneration rate allows the host to track fast touches and any additional movements without noticeable delays. The embedded processor filters the data, identifies touch coordinates, and reports the coordinates to the host. The embedded firmware can be updated via patch loading. Of course, other numbers of drive and sense lines are contemplated, such as 8x12 and 12x20 arrays.
觸控式螢幕控制器100之特徵為具有變化之功率消耗位準的多個操作模式。在休止模式中,控制器100以由休止速率暫存器所程式化之速率週期性地尋找觸摸。存在各自具有連續降低之功率消耗的多個休止模式。在不存在觸摸歷時某一時間間隔的情況下,控制器100自動地轉換至次低功率消耗模式。然而,隨著功率消耗減小,對觸摸之回應時間增加。 Touch screen controller 100 features multiple modes of operation with varying power consumption levels. In the dormant mode, controller 100 periodically looks for a touch at a rate programmed by the rest rate register. There are multiple sleep modes each having a continuously reduced power consumption. In the event that there is no touch duration for a certain time interval, the controller 100 automatically switches to the next low power consumption mode. However, as power consumption decreases, the response time to touch increases.
根據一實施例且如圖9中所展示,觸控式螢幕90上之ITO網格包含多個列20a-20p(或Y線1-16)及多個行10a-10i(或X線1-9),其中列20a-20p可操作地連接至第二驅動感測電路40b/50b且行10a-10i可操作地連接至第一感測驅動電路40a/50a。圖4中展示用於將ITO驅動及感測線佈線至觸控 式螢幕控制器100之一組態。 According to an embodiment and as shown in FIG. 9, the ITO grid on the touch screen 90 includes a plurality of columns 20a-20p (or Y lines 1-16) and a plurality of rows 10a-10i (or X lines 1 - 9), wherein columns 20a-20p are operatively coupled to second drive sensing circuitry 40b/50b and rows 10a-10i are operatively coupled to first sense drive circuitry 40a/50a. Figure 4 shows the wiring of ITO driving and sensing lines to touch One of the configurations of the screen controller 100.
熟習此項技術者將理解,在不脫離本發明之各種實施例的範疇或精神的情況下,不同於經修改之AMR1-5000晶片或觸控式螢幕控制器100的觸控式螢幕控制器、微處理器、ASIC或CPU可用於觸控式螢幕系統110中,且可使用與本文中明確展示之彼等驅動及感測線以及驅動及感測電極不同數目的驅動及感測線以及不同數目與組態的驅動及感測電極。 Those skilled in the art will appreciate that touch screen controllers other than the modified AMR1-5000 wafer or touch screen controller 100, without departing from the scope or spirit of the various embodiments of the present invention, A microprocessor, ASIC or CPU can be used in the touchscreen system 110 and can use a different number of drive and sense lines and different numbers and groups than their drive and sense lines and drive and sense electrodes as explicitly demonstrated herein. Drive and sense electrodes.
現參看圖5,展示包含觸控式螢幕90及觸控式螢幕控制器100之電容性觸控式螢幕系統110的一實施例。如所展示,觸控式螢幕控制器100包含驅動/感測處理器102、第一驅動感測電路40a/50a及第二驅動感測電路40b/50b。驅動感測電路40a/50a可操作地連接至觸控式螢幕90之第一複數個跡線10a-10i(圖9中之線1-9)。驅動感測電路40b/50b可操作地連接至觸控式螢幕90之第二複數個跡線20a-20p(圖9中之線1-16)。如圖4、圖5及圖9中所展示,觸控式螢幕90包含排列成列或行之第一複數個跡線10a-10i(分別對應於X線1-9),及排列成相對於該第一複數個跡線10a-10i之該等列或該等行以一角度排列之列或行的第二複數個跡線20a-20p(分別對應於Y線1-16)。互電容30(參見圖7及圖9)存在於該第一複數個跡線10a-10i與該第二複數個跡線20a-20p之間於該第一複數個跡線與該第二複數個跡線相交之位置處,此等互電容30在存在接近其之一或多個手指的情況下改變。 Referring now to FIG. 5, an embodiment of a capacitive touch screen system 110 including a touch screen 90 and a touch screen controller 100 is shown. As shown, the touch screen controller 100 includes a drive/sense processor 102, first drive sense circuits 40a/50a, and second drive sense circuits 40b/50b. The drive sensing circuits 40a/50a are operatively coupled to the first plurality of traces 10a-10i of the touchscreen 90 (lines 1-9 in Figure 9). The drive sensing circuits 40b/50b are operatively coupled to the second plurality of traces 20a-20p of the touchscreen 90 (lines 1-16 in Figure 9). As shown in FIG. 4, FIG. 5 and FIG. 9, the touch screen 90 includes a first plurality of traces 10a-10i (corresponding to X lines 1-9 respectively) arranged in columns or rows, and arranged in relation to The columns of the first plurality of traces 10a-10i or the second plurality of traces 20a-20p of the rows or rows of the rows arranged at an angle (corresponding to Y-lines 1-16, respectively). A mutual capacitance 30 (see FIGS. 7 and 9) exists between the first plurality of traces 10a-10i and the second plurality of traces 20a-20p at the first plurality of traces and the second plurality At the location where the traces intersect, the mutual capacitance 30 changes in the presence of one or more fingers.
提供可操作地連接至該第一複數個跡線10a-10i之第一驅動感測電路40a/50a。第一驅動感測電路40a/50a包含一組個別切換及放大電路42a,該組個別切換及放大電路42a後又接著個別地與其對應的一組比較器44a。第一驅動感測電路40a/50a中之每一者可操作地連接至該第一複數個跡線或線10a-10i中之一相應者,每一第一驅動感測電路包含可操作地連接至觸控式螢幕90上之其相應跡線且連接至放大器的切換電路及連接至該放大器之輸出端及負輸入端(參見圖5中之42a)且連接至比較器的電容器,該比較器可操作地連接至該放大器之該輸出端(參見圖5中之44a)。 A first drive sensing circuit 40a/50a operatively coupled to the first plurality of traces 10a-10i is provided. The first drive sensing circuit 40a/50a includes a set of individual switching and amplifying circuits 42a, which in turn are individually followed by a corresponding set of comparators 44a. Each of the first drive sensing circuits 40a/50a is operatively coupled to one of the first plurality of traces or lines 10a-10i, each first drive sensing circuit comprising an operatively coupled a switching circuit to the corresponding trace on the touch screen 90 and connected to the amplifier and a capacitor connected to the output and the negative input of the amplifier (see 42a in FIG. 5) and connected to the comparator, the comparator It is operatively coupled to the output of the amplifier (see 44a in Figure 5).
提供可操作地連接至該第二複數個跡線20a-20i之第二驅動感測電路40b/50b。第二驅動感測電路40b/50b包含一組個別切換及放大電路42b,該組個別切換及放大電路42b後又接著一組個別比較器44b。第二驅動感測電路40b/50b中之每一者可操作地連接至該第二複數個跡線20a-20p中之一相應者,每一第二驅動感測電路包含可操作地連接至觸控式螢幕90上之其相應跡線且連接至放大器的切換電路及連接至該放大器之輸出端及負輸入端(參見圖5中之42b)且連接至比較器的電容器,該比較器可操作地連接至該放大器之該輸出端(參見圖5中之44b)。 A second drive sensing circuit 40b/50b operatively coupled to the second plurality of traces 20a-20i is provided. The second drive sensing circuit 40b/50b includes a set of individual switching and amplifying circuits 42b, which in turn are followed by a set of individual comparators 44b. Each of the second drive sensing circuits 40b/50b is operatively coupled to one of the second plurality of traces 20a-20p, each second drive sensing circuit including an operatively coupled touch The corresponding trace on the control screen 90 is connected to the switching circuit of the amplifier and to the output and negative input of the amplifier (see 42b in FIG. 5) and to the capacitor of the comparator, the comparator is operable Ground is connected to the output of the amplifier (see 44b in Figure 5).
圖6展示圖5之感測驅動電路40a/50a或40b/50b之電路中的一者之許多可能實施例中的一者。如所展示,電路43包含運算放大器45與回饋電容器46、取樣及保持電路47、比較器48,及正反器49。亦涵蓋使用合適的電及/或電子組 件及電路達成相同或實質上相同之功能性的電路43及感測驅動電路40a/50a及40b/50b的其他實施例,如熟習此項技術者現將瞭解。 6 shows one of many possible embodiments of one of the circuits of sense drive circuit 40a/50a or 40b/50b of FIG. As shown, circuit 43 includes operational amplifier 45 and feedback capacitor 46, sample and hold circuit 47, comparator 48, and flip-flop 49. Also covers the use of suitable electrical and / or electronic groups Other embodiments of the circuit 43 and the sensing drive circuits 40a/50a and 40b/50b that achieve the same or substantially the same functionality, as will be appreciated by those skilled in the art.
如圖5中進一步展示,較佳(但未必)形成觸控式螢幕控制器100(其較佳為晶片、積體電路或ASIC)之一部分的驅動/感測處理器102可操作地分別連接至第一驅動感測電路40a/50a及第二驅動感測電路40b/50b,且經組態以進行以下操作:(a)控制第一驅動感測電路40a/50a驅動該第一複數個跡線10a-10i中之至少一些,且控制第二驅動感測電路40b/50b經由該第二複數個跡線20a-20p感測互電容30中之至少一些,及(b)控制第二驅動感測電路40b/50b驅動該第二複數個跡線20a-20p中之至少一些,且控制第一驅動感測電路40a/50a經由該第一複數個跡線10a-10i感測互電容30中之至少一些。 As further shown in FIG. 5, a drive/sense processor 102 that preferably (but not necessarily) forms part of a touch screen controller 100 (which is preferably a wafer, integrated circuit or ASIC) is operatively coupled to First drive sensing circuit 40a/50a and second drive sense circuit 40b/50b, and configured to: (a) control first drive sense circuit 40a/50a to drive the first plurality of traces At least some of 10a-10i, and controlling second drive sensing circuit 40b/50b to sense at least some of mutual capacitance 30 via the second plurality of traces 20a-20p, and (b) controlling second drive sensing The circuit 40b/50b drives at least some of the second plurality of traces 20a-20p and controls the first drive sensing circuit 40a/50a to sense at least one of the mutual capacitances 30 via the first plurality of traces 10a-10i some.
圖5、圖6及圖7進一步展示:第一驅動感測電路40a/50a及第二驅動感測電路40b/50b可包含電路43(對於個別感測驅動電路而言,其安置於電路40a/50a及40b/50b內),第一驅動感測電路40a/50a及第二驅動感測電路40b/50b中之電容器可包含取樣及保持電容器電路46及47,且可進一步包含邏輯電路,該邏輯電路經組態以准許第一驅動感測電路40a/50a及第二驅動感測電路40b/50b中之每一者在驅動/感測處理器102之控制下以可選擇及可互換之方式操作為驅動電路或操作為感測電路。應注意,驅動/感測處理器102可經組態以控制第一驅動感測電路40a/50a或第二驅動感測 電路40b/50b,以使得該第一複數個跡線10a-10i或該第二複數個跡線20a-20p中之跡線可實質上同時被驅動,且使得該第一複數個跡線10a-10i或該第二複數個跡線20a-20p中之跡線可實質上同時被感測。應進一步注意,個別驅動感測電路中之放大器可經組態以操作為隨耦器,其中在驅動感測電路經組態為驅動器電路時無電容安置於放大器之回饋迴路中。驅動感測電路之此等隨耦器組態可經由使用合適的切換及邏輯電路來實現。 5, 6 and 7 further show that the first drive sensing circuit 40a/50a and the second drive sensing circuit 40b/50b can comprise a circuit 43 (for an individual sense drive circuit, which is disposed in the circuit 40a/ 50a and 40b/50b), the capacitors in the first drive sensing circuit 40a/50a and the second drive sensing circuit 40b/50b may include sample and hold capacitor circuits 46 and 47, and may further include logic circuits, the logic The circuitry is configured to permit each of the first drive sense circuit 40a/50a and the second drive sense circuit 40b/50b to operate in a selectable and interchangeable manner under the control of the drive/sense processor 102 The driving circuit or the operation is a sensing circuit. It should be noted that the drive/sense processor 102 can be configured to control the first drive sense circuit 40a/50a or the second drive sense Circuitry 40b/50b such that the traces in the first plurality of traces 10a-10i or the second plurality of traces 20a-20p can be driven substantially simultaneously, and such that the first plurality of traces 10a- The traces in 10i or the second plurality of traces 20a-20p may be sensed substantially simultaneously. It should be further noted that the amplifiers in the individual drive sensing circuits can be configured to operate as a follower, wherein no capacitance is placed in the feedback loop of the amplifier when the drive sense circuit is configured as a driver circuit. These follower configurations of the drive sensing circuit can be implemented using suitable switching and logic circuits.
現參看圖5及圖6,該第一複數個驅動感測電路40a/50a及該第二複數個驅動感測電路40b/50b中之比較器組44a及44b中之比較器中的每一者經組態以在預定臨限電壓Vt下偵測與其相應互電容30相關聯的電壓。該第一複數個驅動感測電路40a/50a及該第二複數個驅動感測電路40b/50b中之比較器組44a及44b中之比較器中的至少一些亦可經組態以在預定高電壓臨限值及預定低電壓臨限值下偵測與其相應互電容30相關聯的電壓。此外,驅動/感測處理器102可經進一步組態以控制第一驅動感測電路40a/50a及第二驅動感測電路40b/50b實質上同時感測觸控式螢幕90上之多個互電容,或偵測觸控式螢幕90上之多個同時或近同時觸摸之位置,下文陳述關於此的更多細節。可使用比較器組44a及44b偵測與對應於多個同時或近同時觸摸之位置之互電容30相關聯的電壓來實現對觸控式螢幕90上之該等位置的偵測,下文陳述關於此的更多細節。驅動/感測處理器102可經進一步組態而以已偵測到之觸摸之位置為基礎來 控制驅動該第一複數個跡線10a-10i及該第二複數個跡線20a-20p中之多個所選擇者,及/或以已偵測到之觸摸之位置為基礎來控制感測互電容30中之多個所選擇者,下文陳述關於此的更多細節。驅動/感測處理器102亦可經組態以產生與所偵測到之觸摸之位置相關聯的標籤,及/或產生與所偵測到之觸摸之量值相關聯的標籤,下文陳述關於此的更多細節。 Referring now to Figures 5 and 6, each of the first plurality of drive sensing circuits 40a/50a and the comparators of the comparator sets 44a and 44b of the second plurality of drive sensing circuits 40b/50b It was configured to detect the voltage corresponding thereto is associated with the mutual capacitance 30 at a predetermined threshold voltage V t. At least some of the first plurality of drive sense circuits 40a/50a and the comparators of the comparator sets 44a and 44b of the second plurality of drive sense circuits 40b/50b may also be configured to be at a predetermined high The voltage associated with its respective mutual capacitance 30 is detected at a voltage threshold and a predetermined low voltage threshold. In addition, the drive/sense processor 102 can be further configured to control the first drive sense circuit 40a/50a and the second drive sense circuit 40b/50b to substantially simultaneously sense multiple mutuals on the touch screen 90. Capacitance, or detecting multiple simultaneous or near simultaneous touch locations on the touch screen 90, more details regarding this are set forth below. Detection of the locations on the touchscreen 90 can be accomplished using comparator groups 44a and 44b to detect voltages associated with mutual capacitances 30 corresponding to locations of multiple simultaneous or near simultaneous touches, as set forth below. More details on this. The drive/sense processor 102 can be further configured to control driving the first plurality of traces 10a-10i and the second plurality of traces 20a-20p based on the detected position of the touch A plurality of selected persons, and/or a plurality of selected ones of the sensing mutual capacitances 30 are controlled based on the detected positions of the touches, and more details regarding this are set forth below. The drive/sense processor 102 can also be configured to generate a tag associated with the location of the detected touch and/or generate a tag associated with the magnitude of the detected touch, as set forth below. More details on this.
在一實施例中,該第一複數個跡線10a-10i與該第二複數個跡線20a-20p之間的角度為約90度,但可為諸如約15度、約30度、約45度、約60度或約75度之任何合適角度。該第一複數個跡線10a-10i及該第二複數個跡線20a-20p可分別安置於實質上平行但在垂直方向上偏移的第一平面及第二平面中,或可安置於實質上同一平面中。在一實施例中,該第一複數個跡線10a-10i及該第二複數個跡線20a-20p包含氧化銦錫(「ITO」)或任何其他合適的導電材料。液晶顯示器或任何其他合適的影像顯示器可安置於該第一複數個跡線10a-10i及該第二複數個跡線20a-20p之下。該第一複數個跡線10a-10i及該第二複數個跡線20a-20p較佳安置於實質上光學透明之包含電絕緣材料的基板上。 In one embodiment, the angle between the first plurality of traces 10a-10i and the second plurality of traces 20a-20p is about 90 degrees, but can be, for example, about 15 degrees, about 30 degrees, about 45 degrees. Any suitable angle of degree, about 60 degrees or about 75 degrees. The first plurality of traces 10a-10i and the second plurality of traces 20a-20p may be respectively disposed in a first plane and a second plane that are substantially parallel but offset in a vertical direction, or may be disposed in the substantial On the same plane. In one embodiment, the first plurality of traces 10a-10i and the second plurality of traces 20a-20p comprise indium tin oxide ("ITO") or any other suitable electrically conductive material. A liquid crystal display or any other suitable image display can be disposed under the first plurality of traces 10a-10i and the second plurality of traces 20a-20p. The first plurality of traces 10a-10i and the second plurality of traces 20a-20p are preferably disposed on a substantially optically transparent substrate comprising an electrically insulating material.
應注意,觸控式螢幕系統110可併入以下各者中或形成以下各者之一部分:LCD、電腦顯示器、膝上型電腦、個人資料助理(PDA)、行動電話、無線電、MP3播放器、攜帶型音樂播放器、固定器件、電視機、立體聲系統(stereo)、練習機、工業控制、控制面板、戶外控制器件、 家用電器,或任何其他合適的電子器件。 It should be noted that the touchscreen system 110 can be incorporated into or form part of one of the following: LCD, computer display, laptop, personal data assistant (PDA), mobile phone, radio, MP3 player, Portable music player, fixed device, TV, stereo (stereo), exercise machine, industrial control, control panel, outdoor control device, Household appliances, or any other suitable electronic device.
在另一實施例中,提供一種偵測前述電容性觸控式螢幕系統上之觸摸的方法,其包含:(a)經由第一驅動感測電路40a/50a驅動該第一複數個跡線10a-10i;(b)經由該第二複數個跡線20a-20p及第二驅動感測電路40b/50b感測互電容30;(c)經由第二驅動感測電路40b/50b驅動該第二複數個跡線20a-20p;(d)經由該第一複數個跡線10a-10i及第一驅動感測電路40a/50a感測互電容30;及(e)以超過預定電壓臨限值之所感測互電容為基礎來偵測觸控式螢幕90上之一或多個觸摸的位置。 In another embodiment, a method of detecting a touch on a capacitive touch screen system is provided, comprising: (a) driving the first plurality of traces 10a via a first drive sensing circuit 40a/50a -10i; (b) sensing the mutual capacitance 30 via the second plurality of traces 20a-20p and the second drive sensing circuit 40b/50b; (c) driving the second via the second drive sensing circuit 40b/50b a plurality of traces 20a-20p; (d) sensing the mutual capacitance 30 via the first plurality of traces 10a-10i and the first drive sensing circuit 40a/50a; and (e) exceeding a predetermined voltage threshold The sensing mutual capacitance is used to detect the position of one or more touches on the touch screen 90.
此方法可進一步包含:經由第一驅動感測電路40a/50a實質上同時驅動該第一複數個跡線10a-10i;經由第二驅動感測電路40b/50b實質上同時驅動該第二複數個跡線20a-20p;經由第一驅動感測電路40a/50a實質上同時感測互電容30中之至少一些;及/或經由第二驅動感測電路40b/50b實質上同時感測互電容30中之至少一些。應注意,感測可包含偵測與互電容30相關聯之電壓。 The method can further include: driving the first plurality of traces 10a-10i substantially simultaneously via the first drive sensing circuit 40a/50a; driving the second plurality of substantially simultaneously via the second drive sensing circuit 40b/50b Traces 20a-20p; substantially simultaneously sensing at least some of the mutual capacitances 30 via the first drive sensing circuits 40a/50a; and/or substantially simultaneously sensing the mutual capacitances 30 via the second drive sensing circuits 40b/50b At least some of them. It should be noted that sensing can include detecting a voltage associated with the mutual capacitance 30.
在一實施例中,一方法亦可包含:經由比較器組44a及/或44b偵測觸控式螢幕90上之多個同時或近同時觸摸之位置;偵測與對應於該等位置之互電容30相關聯的電壓;以已偵測到之觸摸之位置為基礎來驅動第一驅動感測電路40a/50a及第二驅動感測電路40b/50b中之多個所選擇者;以已偵測到之觸摸之位置為基礎來感測第一驅動感測電路40a/50a及第二驅動感測電路40b/50b中之多個所選擇者; 產生與所偵測到之觸摸之位置相關聯的標籤;及產生與所偵測到之觸摸之量值相關聯的標籤。 In an embodiment, a method may further include: detecting, by the comparator group 44a and/or 44b, a plurality of simultaneous or near simultaneous touch positions on the touch screen 90; detecting and interacting with the positions corresponding to the positions a voltage associated with the capacitor 30; driving a plurality of selected ones of the first driving sensing circuit 40a/50a and the second driving sensing circuit 40b/50b based on the detected position of the touch; Sensing a plurality of selected ones of the first driving sensing circuit 40a/50a and the second driving sensing circuit 40b/50b based on the position of the touch; Generating a tag associated with the detected location of the touch; and generating a tag associated with the magnitude of the detected touch.
現參看圖7,展示第一驅動感測電路40a/50a及第二驅動感測電路40b/50b之個別元件的一實施例。如所說明,使用沿X軸及Y軸(參見圖9)安置之該第一複數個跡線10a-10i(X線1-9)及該第二複數個跡線20a-20p(Y線1-16)中之多個所選擇者經由單一互電容30來連接該兩個驅動感測電路40a/50a及40b/50b。結果,圖7中之互電容30表示位於該第一複數個跡線10及該第二複數個跡線20中之多個所選擇者之單一相交點處的單一交叉耦接電容器,其中互電容30之量值取決於觸控式螢幕90上接近互電容30之手指的存在或不存在。選擇圖7之驅動感測電路40a/50a或40b/50b之個別驅動感測電路中的一者以驅動跡線10a-10i或20a-20p當中之所選擇線,而選擇圖7之另一個別驅動感測電路40a/50a或40b/50b以經由互電容30感測來自跡線10a-10i或20a-20p當中之所選擇線。圖7中所展示之個別驅動感測電路40a/50a或40b/50b中的每一者為具有取樣及保持電容器之電荷積累器電路,該等電容器可被斷開或藉由所收集之電荷來保持浮動且可用於進一步處理。當用於電荷積累器電路中之放大器中之每一者用作觸控式螢幕線或跡線驅動器時,儲存該放大器之輸出及反相輸入。每一電荷積累器電路之虛擬接地可針對感測操作模式及驅動操作模式兩者而連接至低驅動電位及高驅動電位。在一實施例中,使用圖7中所展示之簡單邏輯電路來組態個別電路40a/50a及 40b/50b中之每一者,以按可互換及可選擇之方式在感測、儲存及驅動模式中操作。在被充電而作為負回饋元件之後,驅動感測電路40a/50a或40b/50b中之每一者中的電容器可在相應放大器切換為驅動模式時被斷開以供儲存所收集之電荷。圖8中展示准許感測及驅動用於圖7中所展示之電路之信號的邏輯控制之命令序列的一實施例。當在給定開關驅動下呈現邏輯信號高狀態時,閉合對應於該給定開關驅動之開關。 Referring now to Figure 7, an embodiment of the individual components of the first drive sensing circuit 40a/50a and the second drive sensing circuit 40b/50b is shown. As illustrated, the first plurality of traces 10a-10i (X lines 1-9) and the second plurality of traces 20a-20p (Y lines 1) disposed along the X and Y axes (see FIG. 9) are used. A plurality of selected ones of -16) connect the two drive sensing circuits 40a/50a and 40b/50b via a single mutual capacitance 30. As a result, the mutual capacitance 30 in FIG. 7 represents a single cross-coupling capacitor at a single intersection of a plurality of selected ones of the first plurality of traces 10 and the second plurality of traces 20, wherein the mutual capacitance 30 The magnitude depends on the presence or absence of a finger on the touch screen 90 that is close to the mutual capacitance 30. One of the individual drive sensing circuits of the drive sense circuit 40a/50a or 40b/50b of FIG. 7 is selected to drive the selected one of the traces 10a-10i or 20a-20p, and another one of FIG. 7 is selected. The sense circuits 40a/50a or 40b/50b are driven to sense selected lines from among the traces 10a-10i or 20a-20p via the mutual capacitance 30. Each of the individual drive sensing circuits 40a/50a or 40b/50b shown in Figure 7 is a charge accumulator circuit having sample and hold capacitors that can be turned off or by the collected charge. Keep floating and available for further processing. When each of the amplifiers used in the charge accumulator circuit is used as a touch screen line or trace driver, the output of the amplifier and the inverting input are stored. The virtual ground of each charge accumulator circuit can be coupled to a low drive potential and a high drive potential for both the sense mode of operation and the drive mode of operation. In an embodiment, the individual circuits 40a/50a are configured using the simple logic circuit shown in FIG. Each of 40b/50b operates in a sensing, storage and drive mode in an interchangeable and selectable manner. After being charged as a negative feedback element, the capacitors in each of the drive sensing circuits 40a/50a or 40b/50b can be turned off for storing the collected charge when the respective amplifiers are switched to the drive mode. One embodiment of a command sequence that permits the sensing and driving of logic control for signals of the circuits shown in FIG. 7 is shown in FIG. When a logic signal high state is presented with a given switch drive, the switch corresponding to the given switch drive is closed.
現參看圖9,展示包含第一複數個跡線10a至10i(X線1-9)及第二複數個跡線20a至20p(Y線1-16)之9×16觸控式螢幕90的一實施例。在一實施例中,當在觸控式螢幕90上未進行手指觸摸時,觸控式螢幕90上之每一像素之互電容30(或驅動至感測電容器)各自具有約1pF的電容。在存在觸控式螢幕90上之手指觸摸的情況下,此等互電容改變至約0.7pF。在圖9中,觸控式螢幕90上之每一手指觸摸引起安置於2×2像素叢集內之互電容30的改變。 Referring now to Figure 9, a 9 x 16 touch screen 90 comprising a first plurality of traces 10a through 10i (X lines 1-9) and a second plurality of traces 20a through 20p (Y lines 1-16) is shown. An embodiment. In one embodiment, when no finger touch is made on the touch screen 90, the mutual capacitance 30 (or driving to the sensing capacitor) of each pixel on the touch screen 90 each has a capacitance of about 1 pF. In the presence of a finger touch on the touch screen 90, these mutual capacitances change to about 0.7 pF. In FIG. 9, each finger touch on touch screen 90 causes a change in mutual capacitance 30 disposed within a 2x2 pixel cluster.
在一實施例中,由觸控式螢幕90所提供及來自觸控式螢幕90之信號的感測、驅動及預處理遵循下文所論述之驅動及感測協定。參看圖5中所展示之方塊圖來描述由觸控式螢幕90所提供之信號的處理(由將驅動信號提供至觸控式螢幕90而引起)及信號之感測(由接近觸控式螢幕90置放之一或多個手指的存在引起)。 In one embodiment, the sensing, driving, and pre-processing of signals provided by touch screen 90 and from touch screen 90 follows the drive and sensing protocols discussed below. Referring to the block diagram shown in FIG. 5, the processing of the signal provided by the touch screen 90 (caused by the driving signal to the touch screen 90) and the sensing of the signal (by the proximity touch screen) are described. 90 placement of one or more fingers caused by).
在一實施例中,觸控式螢幕90之驅動開始於感測驅動電路40a/50a驅動所有X線1-9(該第一複數個跡線10a-10i),同 時在可操作地連接至Y線1-16(該第二複數個跡線20a-20p)之感測驅動電路40b/50b之電荷積累器電路中獲取電荷,其後接著將Y線信號儲存至感測驅動電路40b/50b之保持電容器中。應注意,上文所描述之積分電容器可用於信號儲存。在驅動期間,驅動感測電路40a/50a在組態於緩衝器模式下之情況下可操作地連接至X線1-9,而感測驅動電路40b/50b在組態於積累器模式下之情況下可操作地連接至Y線。分別可操作地連接至X線及Y線之感測驅動電路40a/40b及40b/50b的虛擬接地連接至驅動電位之相應低位準及高位準。感測命令序列類似於針對上文結合圖7及圖8所描述之電路而描述的感測命令序列。 In one embodiment, the driving of the touch screen 90 begins with the sensing driving circuit 40a/50a driving all of the X lines 1-9 (the first plurality of traces 10a-10i), the same The charge is acquired in the charge accumulator circuit of the sense drive circuit 40b/50b operatively connected to the Y lines 1-16 (the second plurality of traces 20a-20p), and then the Y line signal is then stored to The holding capacitors of the drive circuit 40b/50b are sensed. It should be noted that the integrating capacitors described above can be used for signal storage. During driving, the drive sensing circuits 40a/50a are operatively coupled to the X-rays 1-9 while configured in the buffer mode, while the sense drive circuits 40b/50b are configured in the accumulator mode. In this case, it is operatively connected to the Y line. The virtual grounds of the sense drive circuits 40a/40b and 40b/50b, which are operatively coupled to the X and Y lines, respectively, are coupled to respective low and high levels of drive potential. The sense command sequence is similar to the sense command sequence described for the circuits described above in connection with FIGS. 7 and 8.
在感測驅動電路40b/50b之電容器中所獲取之對應於Y線信號的電荷資料接著作為電位呈現至比較器組44b之比較器,其中偵測超過預定臨限值Vt之信號。如上文所描述,圖6展示經組態以感測此等信號且將此等信號呈現至與之對應的比較器48之單感測驅動電路的一實施例。在將所偵測之Y線信號之資料呈現至比較器的同時,可藉由以下操作來開始X線信號之獲取或感測:組態可操作地連接至Y線之感測驅動電路40b/50b以用於在驅動模式下操作,及將驅動信號施加至所有Y線,同時將電荷獲取至經組態為可操作地連接至X線之電荷積累器電路的感測驅動電路40a/50a中。 The charge data corresponding to the Y line signal acquired in the capacitor of the sense drive circuit 40b/50b is connected to a comparator whose potential is presented to the comparator group 44b, wherein a signal exceeding a predetermined threshold value V t is detected. As described above, FIG. 6 shows an embodiment of a single sense drive circuit configured to sense the signals and present the signals to a comparator 48 corresponding thereto. While the data of the detected Y line signal is presented to the comparator, the acquisition or sensing of the X-ray signal can be initiated by configuring the sensing drive circuit 40b operatively connected to the Y line. 50b for operating in the drive mode and applying a drive signal to all of the Y lines while simultaneously taking charge into the sense drive circuit 40a/50a configured to be operatively coupled to the X-line charge accumulator circuit .
為了偵測圖9之觸控式螢幕90上所進行之多個同時或近同時手指觸摸61、62、63、64及65的位置,沿圖9中之觸 控式螢幕90之X軸及Y軸所執行的十個模擬之連續感測及驅動循環說明為圖10至圖19中之直方圖,該等直方圖分別對應於循環1至循環10。如藉由參看該等直方圖將可見,沿X軸及Y軸所感測之重疊及非重疊觸摸對應於多個所感測觸摸且因而為清楚可見的。 In order to detect the positions of a plurality of simultaneous or near simultaneous finger touches 61, 62, 63, 64, and 65 performed on the touch screen 90 of FIG. 9, the touches in FIG. The ten simulated continuous sensing and driving cycles performed by the X-axis and the Y-axis of the control screen 90 are illustrated as histograms in FIGS. 10-19, which correspond to loops 1 through 10, respectively. As will be seen by reference to the histograms, the overlapping and non-overlapping touches sensed along the X and Y axes correspond to a plurality of sensed touches and are thus clearly visible.
當參看圖9及圖10至圖19中所展示之所感測觸摸信號的直方圖時,將可見,對於X軸所感測信號,兩個觸摸沿相同X線重疊(參見沿X線4及5安置之觸摸62及65),且對於Y軸所感測信號,一個觸摸沿相同Y線重疊(參見沿Y線3及4安置之觸摸62及63)。每一觸摸之觸摸區佔據兩個像素乘兩個像素之區域。其他處理係基於將感測程序表徵為超過預定臨限值Vt之兩個相鄰觸摸信號的選擇準則。更進階之處理準則亦可用以使用超過不同電壓臨限值之所感測信號來選擇所關注之信號處理區,諸如,視窗比較(高於低臨限值VtL且低於高臨限值VtH)。為了使用沿X軸及Y軸所感測之信號來清楚地清理出(disentangle)非重疊觸摸,可使用不同或經修改之選擇準則。然而,下文詳細描述相對簡單之觸摸感測方法或演算法。 Referring to the histograms of the sensed touch signals as shown in Figures 9 and 10 through 19, it will be seen that for the X-axis sensed signals, the two touches overlap along the same X-ray (see placement along X-lines 4 and 5). Touches 62 and 65), and for the sensed signal of the Y-axis, one touch overlaps along the same Y line (see touches 62 and 63 placed along lines 3 and 4). The touch area of each touch occupies an area of two pixels by two pixels. Other processing is based on selection criteria that characterize the sensing program as two adjacent touch signals that exceed a predetermined threshold Vt. More advanced processing criteria can also be used to select signal processing regions of interest using sensed signals that exceed different voltage thresholds, such as window comparisons (above low threshold V tL and below high threshold V) tH ). In order to clearly disentangle non-overlapping touches using signals sensed along the X and Y axes, different or modified selection criteria can be used. However, a relatively simple touch sensing method or algorithm is described in detail below.
如上文所提及,下文所描述之觸摸感測方法或演算法係基於具有2個像素乘2個像素之區域的所關注之區的選擇,其中相鄰的所感測信號超過預定信號臨限值Vt。在本文中進一步詳細論述之觸摸感測實例中,Vt經選擇為0.5V。應注意,不同所感測讀出線的不同組合結合所感測信號之處理可用以分開彼此接近地出現之多個手指觸摸。 As mentioned above, the touch sensing method or algorithm described below is based on the selection of the region of interest with a region of 2 pixels by 2 pixels, wherein the adjacent sensed signals exceed a predetermined signal threshold. V t . Examples of the sense of touch sensing are discussed in further detail herein, V t is chosen to 0.5V. It should be noted that the processing of different combinations of different sensed readout lines in conjunction with the sensed signals can be used to separate multiple finger touches that occur close to each other.
如圖9中所展示,多個同時或近同時觸摸61至65位於觸控式螢幕90上之不同座標或位置處。觸摸61位於像素或觸控式螢幕位置X(2,3),Y(2,3)處。觸摸62位於像素或觸控式螢幕位置X(4,5),Y(4,5)處。觸摸63位於像素或觸控式螢幕位置X(7,8),Y(4,5)處。觸摸64位於像素或觸控式螢幕位置X(7,8),Y(7,8)處。觸摸65位於像素或觸控式螢幕位置X(4,5),Y(14,15)處。 As shown in FIG. 9, a plurality of simultaneous or near simultaneous touches 61-65 are located at different coordinates or locations on the touchscreen 90. The touch 61 is located at the pixel or touch screen position X (2, 3), Y (2, 3). The touch 62 is located at the pixel or touch screen position X (4, 5), Y (4, 5). The touch 63 is located at the pixel or touch screen position X (7, 8), Y (4, 5). Touch 64 is located at pixel or touch screen position X (7, 8), Y (7, 8). The touch 65 is located at the pixel or touch screen position X (4, 5), Y (14, 15).
圖10表示在循環1期間同時驅動所有Y線且同時感測所有X線之結果。如圖10中所展示,藉由第一感測驅動電路40a/50a來偵測觸摸61、62及65以及63及64,此係因為此等觸摸引起待由第一驅動感測電路40a/50a感測到超過0.5伏特之臨限值(或Vt)的信號。如圖10中進一步展示,觸摸61為沿X線2及3安置之僅有觸摸,且因此相比於在X線4及5上偵測到之較高振幅信號(其對應於沿X線4及5安置之多個觸摸62及65)及在X線7及8上偵測到之較高振幅信號(其對應於沿X線7及8安置之多個觸摸63及64),引起待在X線2及3上偵測到之較低振幅信號。在已完成僅循環1之後,不可能判定觸摸61、62、63、64及65中之哪一者對應於觸控式螢幕90上的唯一X,Y位置。 Figure 10 shows the results of simultaneously driving all Y lines while cycling all of the X lines during Cycle 1. As shown in FIG. 10, the touches 61, 62, and 65 and 63 and 64 are detected by the first sensing driving circuit 40a/50a because the touches are caused by the first driving sensing circuit 40a/50a. sensing threshold exceeds 0.5 volts (or V t) signal. As further shown in FIG. 10, touch 61 is the only touch placed along X-rays 2 and 3, and thus is compared to the higher amplitude signal detected on X-rays 4 and 5 (which corresponds to along X-ray 4) And 5 sets of multiple touches 62 and 65) and higher amplitude signals detected on X lines 7 and 8 (which correspond to multiple touches 63 and 64 placed along X lines 7 and 8), causing staying The lower amplitude signal detected on X lines 2 and 3. After loop 1 has been completed, it is not possible to determine which of the touches 61, 62, 63, 64, and 65 corresponds to the unique X, Y position on the touch screen 90.
圖11表示在循環2期間同時驅動所有X線且同時感測所有Y線之結果。如圖11中所展示,藉由第二感測驅動電路40b/50b來偵測觸摸61、62及63以及63及65,此係因為此等觸摸引起待由第二驅動感測電路40b/50b感測到超過0.5伏特之臨限值(或Vt)的信號。如圖11中進一步展示,相比 在Y線4及5上偵測到之較高振幅信號(其對應於沿Y線4及5安置之多個觸摸62及63),觸摸61、64及65引起待分別在Y線2及3、7及8以及14及15上偵測到之較低振幅信號。在已完成僅循環1及2之後,仍不可能判定觸摸61、62、63、64及65中之哪一者對應於觸控式螢幕90上的哪些X,Y位置。但已呈現至驅動/感測處理器102之在循環1及2期間所獲得之資訊由驅動/感測處理器102用以判定在循環3期間接下來應驅動及感測所選擇X線及Y線中的哪些,以使得可開始判定個別觸摸中之每一者之精確且唯一(X,Y)位置的程序。 Figure 11 shows the result of simultaneously driving all X-rays while cycling all of the Y-lines during Cycle 2. As shown in FIG. 11, the touches 61, 62 and 63 and 63 and 65 are detected by the second sensing driving circuit 40b/50b, because the touches are caused by the second driving sensing circuit 40b/50b sensing threshold exceeds 0.5 volts (or V t) signal. As further shown in FIG. 11, touches 61, 64, and 65 are compared to the higher amplitude signals detected on Y lines 4 and 5 (which correspond to the plurality of touches 62 and 63 disposed along Y lines 4 and 5). A lower amplitude signal to be detected on Y lines 2 and 3, 7 and 8 and 14 and 15 respectively. After only cycles 1 and 2 have been completed, it is still not possible to determine which of the touches 61, 62, 63, 64, and 65 corresponds to which X, Y positions on the touch screen 90. However, the information obtained during the cycles 1 and 2 that has been presented to the drive/sense processor 102 is used by the drive/sense processor 102 to determine that the selected X-ray and Y should be subsequently driven and sensed during Cycle 3. Which of the lines are such that a program that determines the exact and unique (X, Y) position of each of the individual touches can begin.
現參看圖12,展示藉由驅動僅X線2及3(已選擇該等線以由驅動/感測處理器102以所感測信號及在循環1及2中所判定之其相應位置為基礎來驅動)及感測所有Y線所獲得的結果。結果,在循環3期間判定觸摸61出現於Y位置Y(2,3)處,且觸摸61對應於超過臨限電壓Vt之僅有所感測信號。 Referring now to Figure 12, it is shown that by driving only X-rays 2 and 3 (the lines have been selected to be based on the sensed signals by the drive/sense processor 102 and their respective positions determined in cycles 1 and 2). Drive) and sense the results obtained by all Y lines. As a result, during the cycle 3 determines a touch position 61 occurs in the Y-Y (2,3) and touch-61 corresponds to just exceed the threshold voltage V t of the sensed signal.
圖13之循環4緊跟在循環3之後。圖13展示藉由驅動僅Y線2及3(已選擇該等線以由驅動/感測處理器102以所感測信號及在循環1、2及3中所判定之其相應位置為基礎來驅動)及感測所有X線所獲得的結果。結果,在循環4期間判定觸摸61出現於X位置X(2,3)處,且觸摸61對應於超過臨限電壓Vt之僅有所感測信號。觸摸61之叢集X,Y座標現已由感測/驅動處理器102判定,且對應於此等叢集座標之資料經多工以用於並行數位化及自驅動/感測處理器102至觸控式螢幕控制器100之其他處理。 Loop 4 of Figure 13 follows loop 3. Figure 13 shows that by driving only Y lines 2 and 3 (the lines have been selected to be driven by the drive/sense processor 102 based on the sensed signals and their respective positions determined in cycles 1, 2 and 3) And sensing the results obtained by all X-rays. As a result, during cycle 4 61 determines the touch occurs at the position X X (2,3) and touch-61 corresponds to just exceed the threshold voltage V t of the sensed signal. The cluster X, Y coordinates of touch 61 are now determined by the sensing/driving processor 102, and the data corresponding to the cluster coordinates is multiplexed for parallel digitization and self-driving/sensing processor 102 to touch Other processing of the screen controller 100.
驅動/感測處理器102再次分析藉由感測驅動電路40a/50a及40b/50b在先前循環期間已呈現至其之所感測資料,且在循環5中繼續進行指示感測驅動電路40a/50a驅動X線3及4且指示感測驅動電路40b/50b感測所有Y線。圖14中展示驅動及感測命令之此特定序列的結果,其中將可見,藉由感測驅動電路40b/50b所感測的信號中無一者觸發沿任何Y線之等於或超過臨限電壓Vt之任何電壓的偵測。結果,在循環5期間,無對應於任何所偵測叢集座標之資料自驅動/感測處理器102傳送至觸控式螢幕控制器100。 The drive/sense processor 102 again analyzes the sensed data that has been rendered to it by the sense drive circuits 40a/50a and 40b/50b during the previous cycle, and continues to indicate the sense drive circuit 40a/50a in cycle 5. The X lines 3 and 4 are driven and the sensing drive circuit 40b/50b is instructed to sense all of the Y lines. The results of this particular sequence of drive and sense commands are shown in FIG. 14, where it will be seen that none of the signals sensed by sense drive circuitry 40b/50b trigger a threshold voltage equal to or greater than any threshold along any Y-line. Detection of any voltage of t . As a result, during loop 5, no data corresponding to any detected cluster coordinates is transmitted from the drive/sense processor 102 to the touch screen controller 100.
驅動/感測處理器102再次分析藉由感測驅動電路40a/50a及40b/50b在先前循環1至5期間已呈現至其之所感測資料,且在循環6中,驅動/感測處理器102指示感測驅動電路40a/50a驅動X線4及5且指示感測驅動電路40b/50b感測所有Y線。圖15中展示驅動及感測命令之此特定序列的結果,其中將可見,沿Y線4及5且沿Y線14及15偵測到臨限電壓,該等臨限電壓分別對應於沿Y線4及5安置之單一觸摸62及沿Y線14及15安置之單一觸摸65。 The drive/sense processor 102 again analyzes the sensed data that has been rendered to it during the previous cycles 1 through 5 by the sense drive circuits 40a/50a and 40b/50b, and in loop 6, the drive/sense processor 102 instructs the sense drive circuit 40a/50a to drive the X lines 4 and 5 and instructs the sense drive circuit 40b/50b to sense all of the Y lines. The results of this particular sequence of drive and sense commands are shown in Figure 15, where it will be seen that threshold voltages are detected along lines Y and 5 and along lines 14 and 15, which correspond to edges along Y, respectively. A single touch 62 disposed along lines 4 and 5 and a single touch 65 disposed along lines 14 and 15 are provided.
循環6之結果為藉由驅動/感測處理器102識別出用於後續驅動及感測信號之另一所關注區,驅動/感測處理器102在循環7期間指示感測驅動電路40b/50b驅動Y線4及5且指示感測驅動電路40a/50a感測所有X線。圖16中展示循環7之指令、驅動及感測之結果,其中歸因於沿X線4及5以及7及8偵測到臨限電壓Vt,分別在X座標X(4,5)及X(7,8)處偵測到觸摸62及63。然而,在循環7期間未提供足夠資訊以 准許待由感測/驅動處理器102判定觸摸62及63之唯一且精確的X,Y位置。 The result of loop 6 is that the drive/sense processor 102 identifies another region of interest for subsequent drive and sense signals, and the drive/sense processor 102 indicates the sense drive circuit 40b/50b during loop 7. The Y lines 4 and 5 are driven and the sensing drive circuit 40a/50a is instructed to sense all of the X lines. Figure 16 shows the results of the command, drive, and sense of Cycle 7, which are due to the detection of the threshold voltage V t along X-rays 4 and 5 and 7 and 8, respectively, at the X coordinate X (4, 5) and Touches 62 and 63 are detected at X (7, 8). However, sufficient information is not provided during loop 7 to permit the sensing and drive processor 102 to determine the unique and precise X, Y position of touches 62 and 63.
因此,在循環8期間,驅動/感測處理器102指示感測驅動電路40b/50b驅動Y線14及15且指示感測驅動電路40a/50a感測所有X線。圖17中展示驅動及感測命令之此特定序列的結果,其中將可見,沿僅X線4及5偵測到臨限電壓,該等臨限電壓對應於沿X線4及5以及Y線14及15安置之觸摸65。因此,藉由驅動/感測處理器102在循環8期間判定觸摸65之唯一且精確的位置。由於在循環1至8期間所獲得之資訊,亦藉由驅動/感測處理器102在循環8期間判定觸摸62之唯一且精確的位置。對應於由感測/驅動處理器102在循環8期間所判定之觸摸62及65之叢集X,Y座標的資料經多工以用於並行數位化及自驅動/感測處理器102至觸控式螢幕控制器100之其他處理。 Thus, during cycle 8, drive/sense processor 102 instructs sense drive circuit 40b/50b to drive Y lines 14 and 15 and instructs sense drive circuit 40a/50a to sense all of the X lines. The results of this particular sequence of drive and sense commands are shown in Figure 17, where it will be seen that threshold voltages are detected along only X lines 4 and 5, which correspond to X and 4 and X lines along X lines. 14 and 15 placement touch 65. Thus, the unique and precise position of the touch 65 is determined during the loop 8 by the drive/sense processor 102. Due to the information obtained during cycles 1 through 8, the unique and precise position of touch 62 is also determined during cycle 8 by drive/sense processor 102. The data corresponding to the cluster X, Y coordinates of the touches 62 and 65 determined by the sensing/driving processor 102 during the loop 8 are multiplexed for parallel digitization and self-driving/sensing processor 102 to touch Other processing of the screen controller 100.
驅動/感測處理器102再次分析藉由感測驅動電路40a/50a及40b/50b在先前循環1至8期間已呈現至其之所感測資料,且在循環9中,驅動/感測處理器102指示感測驅動電路40a/50a驅動X線7及8且指示感測驅動電路40b/50b感測所有Y線。圖18中展示驅動及感測命令之此特定序列的結果,其中將可見,沿Y線4及5且沿Y線7及8偵測到臨限電壓,該等臨限電壓分別對應於沿Y線4及5安置之單一觸摸63及沿Y線7及8安置之單一觸摸64。然而,在循環9期間未提供足夠資訊以准許待由感測/驅動處理器102判定觸摸63及64之唯一且精確的X,Y位置。 The drive/sense processor 102 again analyzes the sensed data that has been rendered to it during the previous cycles 1 through 8 by the sense drive circuits 40a/50a and 40b/50b, and in loop 9, the drive/sense processor 102 instructs the sense drive circuit 40a/50a to drive the X lines 7 and 8 and instructs the sense drive circuit 40b/50b to sense all of the Y lines. The results of this particular sequence of drive and sense commands are shown in Figure 18, where it will be seen that threshold voltages are detected along lines Y and 5 and along lines Y and 8 which correspond to the edge along Y. A single touch 63 placed along lines 4 and 5 and a single touch 64 placed along lines 7 and 8. However, sufficient information is not provided during loop 9 to permit the sensing and drive processor 102 to determine the unique and precise X, Y position of touches 63 and 64.
因此,在循環10期間,驅動/感測處理器102指示感測驅動電路40b/50b驅動Y線7及8且指示感測驅動電路40a/50a感測所有X線。圖19中展示驅動及感測命令之此特定序列的結果,其中將可見,沿僅X線7及8偵測到臨限電壓,該等臨限電壓對應於沿X線7及8以及Y線7及8安置之觸摸64。因此,藉由驅動/感測處理器102在循環10期間判定觸摸64之唯一且精確的位置。由於在循環1至9期間所獲得之資訊,亦藉由驅動/感測處理器102在循環10期間判定觸摸63之唯一且精確的位置。對應於由感測/驅動處理器102在循環8期間所判定之觸摸63及64之叢集X,Y座標的資料經多工以用於並行數位化及自驅動/感測處理器102至觸控式螢幕控制器100之其他處理。 Thus, during cycle 10, drive/sense processor 102 instructs sense drive circuit 40b/50b to drive Y lines 7 and 8 and instructs sense drive circuit 40a/50a to sense all of the X lines. The results of this particular sequence of drive and sense commands are shown in FIG. 19, where it will be seen that threshold voltages are detected along only X lines 7 and 8, which correspond to X lines 7 and 8 and Y lines. 7 and 8 placement touch 64. Thus, the unique and precise location of the touch 64 is determined during the cycle 10 by the drive/sense processor 102. Due to the information obtained during cycles 1 through 9, the unique and precise position of touch 63 is also determined during cycle 10 by drive/sense processor 102. Corresponding to the cluster X, Y coordinates of the touches 63 and 64 determined by the sensing/driving processor 102 during the loop 8 are multiplexed for parallel digitization and self-driving/sensing processor 102 to touch Other processing of the screen controller 100.
應注意,本文中所呈現之各種教示可應用於在(例如)印刷電路板、撓性板或其他合適基板上安置之透光性或非透光性觸控板。儘管咸信電容性觸控式螢幕90主要可能在相對小之攜帶型器件及因此之觸控板及觸控式螢幕的情形下使用,但其在較大器件之情形下亦為有價值的,較大器件包括(例如)與桌上型電腦相關聯之鍵盤或其他不易攜帶之器件(諸如,練習設備、工業控制面板、家用電器及其類似者)。類似地,儘管咸信本發明之許多實施例很有可能經組態以用於由使用者之手指操縱,但一些實施例亦可經組態以用於由其他機構或身體部分操縱。舉例而言,本發明可位於鍵盤之手托板上或手托板中且藉由使用者之手踵嚙合。此外,電容性觸控式螢幕系統110及電容性觸控式 螢幕90之各種實施例在範疇上不限於安置成列之驅動電極及安置成行之感測電極。實情為,列及行關於感測電極及驅動電極可互換。電容性觸控式螢幕系統110及電容性觸控式螢幕90之各種實施例亦能夠結合手寫筆來操作,使得以偵測到觸控式螢幕90上之手寫筆觸摸。系統110及觸控式螢幕90可經進一步組態以准許偵測手指觸摸及手寫筆觸摸兩者。 It should be noted that the various teachings presented herein are applicable to light transmissive or non-transmissive touch panels disposed on, for example, a printed circuit board, flex board, or other suitable substrate. Although the capacitive touch screen 90 is mainly used in the case of relatively small portable devices and thus touch panels and touch screens, it is also valuable in the case of larger devices. Larger devices include, for example, keyboards associated with desktop computers or other non-portable devices (such as exercise equipment, industrial control panels, home appliances, and the like). Similarly, although many embodiments of the invention are likely to be configured for manipulation by a user's fingers, some embodiments may be configured for manipulation by other mechanisms or body parts. For example, the present invention can be located on a hand pallet or a hand pallet of a keyboard and engaged by a user's hand. In addition, the capacitive touch screen system 110 and the capacitive touch type The various embodiments of the screen 90 are not limited in scope to the placement of the drive electrodes in a row and the sensing electrodes disposed in a row. The fact is that the columns and rows are interchangeable with respect to the sensing and driving electrodes. Various embodiments of the capacitive touch screen system 110 and the capacitive touch screen 90 can also be operated in conjunction with a stylus to detect stylus touch on the touch screen 90. System 110 and touch screen 90 can be further configured to permit detection of both finger touch and stylus touch.
應進一步注意,製造(making及having made)本文中所描述之各種組件、器件及系統之方法包括於本發明的範疇內。 It should be further noted that methods of making and having made the various components, devices, and systems described herein are within the scope of the present invention.
應將上文所描述之實施例視為本發明之實例,而非視為限制本發明之範疇。除本發明之前述實施例之外,查看實施方式及隨附圖式亦將展示存在本發明之其他實施例。因此,本文中未明確陳述之本發明之前述實施例的許多組合、置換、變化及修改將仍屬於本發明之範疇。 The embodiments described above are considered as examples of the invention and are not to be considered as limiting the scope of the invention. In addition to the foregoing embodiments of the invention, the embodiments of the invention, Therefore, many combinations, permutations, variations and modifications of the foregoing embodiments of the invention, which are not explicitly described herein, are still within the scope of the invention.
1‧‧‧X線/Y線 1‧‧‧X line/Y line
2‧‧‧X線/Y線 2‧‧‧X line/Y line
3‧‧‧X線/Y線 3‧‧‧X line/Y line
4‧‧‧X線/Y線 4‧‧‧X line/Y line
5‧‧‧X線/Y線 5‧‧‧X line/Y line
6‧‧‧X線/Y線 6‧‧‧X line/Y line
7‧‧‧X線/Y線 7‧‧‧X line/Y line
8‧‧‧X線/Y線 8‧‧‧X line/Y line
9‧‧‧X線/Y線 9‧‧‧X line/Y line
10‧‧‧跡線/Y線 10‧‧‧ Trace/Y line
10a-10i‧‧‧跡線/行 10a-10i‧‧‧ Traces/Lines
11‧‧‧Y線 11‧‧‧Y line
12‧‧‧Y線 12‧‧‧Y line
13‧‧‧Y線 13‧‧‧Y line
14‧‧‧Y線 14‧‧‧Y line
15‧‧‧Y線 15‧‧‧Y line
16‧‧‧Y線 16‧‧‧Y line
20‧‧‧跡線 20‧‧‧ Traces
20a-20p‧‧‧跡線/列 20a-20p‧‧‧ Traces/columns
30‧‧‧互電容 30‧‧‧ mutual capacitance
40a/50a‧‧‧第一驅動感測電路 40a/50a‧‧‧First drive sensing circuit
40b/50b‧‧‧第二驅動感測電路 40b/50b‧‧‧second drive sensing circuit
42a‧‧‧切換及放大電路 42a‧‧‧Switching and amplifying circuit
42b‧‧‧切換及放大電路 42b‧‧‧Switching and amplifying circuit
43‧‧‧電路 43‧‧‧ Circuitry
44a‧‧‧比較器 44a‧‧‧ comparator
44b‧‧‧比較器 44b‧‧‧ comparator
45‧‧‧運算放大器 45‧‧‧Operational Amplifier
46‧‧‧回饋電容器 46‧‧‧Feedback capacitor
47‧‧‧取樣及保持電路 47‧‧‧Sampling and holding circuit
48‧‧‧比較器 48‧‧‧ Comparator
49‧‧‧正反器 49‧‧‧Factor
61‧‧‧觸摸 61‧‧‧Touch
62‧‧‧觸摸 62‧‧‧Touch
63‧‧‧觸摸 63‧‧‧Touch
64‧‧‧觸摸 64‧‧‧Touch
65‧‧‧觸摸 65‧‧‧Touch
90‧‧‧觸敏式面板或觸控式螢幕 90‧‧‧Touch-sensitive panel or touch screen
95‧‧‧保護性蓋板或介電板 95‧‧‧Protective cover or dielectric board
100‧‧‧觸控式螢幕控制器/特殊應用積體電路(「ASIC」)或CPU 100‧‧‧Touch Screen Controller/Special Application Integrated Circuit ("ASIC") or CPU
102‧‧‧驅動/感測處理器 102‧‧‧Drive/Sensor Processor
110‧‧‧電容性觸控式螢幕系統 110‧‧‧Capacitive touch screen system
112‧‧‧LCD或OLED顯示器 112‧‧‧LCD or OLED display
120‧‧‧主機控制器 120‧‧‧Host Controller
圖1展示電容性觸控式螢幕系統之一實施例之橫截面圖;圖2展示電容性觸控式螢幕控制器之方塊圖;圖3展示電容性觸控式螢幕系統及主機控制器之方塊圖的一實施例;圖4展示電容性觸控式螢幕系統之一實施例之示意性方塊圖;圖5展示電容性觸控式螢幕系統之一實施例之方塊圖; 圖6展示電荷積累器電路及相應比較器之一實施例;圖7展示經由觸控式螢幕上之互電容可操作地彼此連接之單驅動感測電路的一實施例;圖8展示對應於圖7中所展示之電路之多個部分的命令邏輯信號;圖9展示電容性觸控式螢幕之一實施例,及圖10至圖19展示對應於沿圖9之觸控式螢幕之X線或Y線所感測的信號的直方圖。 1 shows a cross-sectional view of one embodiment of a capacitive touch screen system; FIG. 2 shows a block diagram of a capacitive touch screen controller; and FIG. 3 shows a block of a capacitive touch screen system and a host controller. FIG. 4 is a schematic block diagram showing an embodiment of a capacitive touch screen system; FIG. 5 is a block diagram showing an embodiment of a capacitive touch screen system; 6 shows an embodiment of a charge accumulator circuit and corresponding comparators; FIG. 7 shows an embodiment of a single drive sense circuit operatively coupled to each other via mutual capacitance on a touch screen; FIG. 8 shows a corresponding diagram Command logic signals for portions of the circuit shown in Figure 7; Figure 9 shows an embodiment of a capacitive touch screen, and Figures 10 through 19 show X-rays corresponding to the touch screen of Figure 9 or A histogram of the signal sensed by the Y line.
10a-10i‧‧‧跡線/行 10a-10i‧‧‧ Traces/Lines
20a-20p‧‧‧跡線/列 20a-20p‧‧‧ Traces/columns
40a/50a‧‧‧第一驅動感測電路 40a/50a‧‧‧First drive sensing circuit
40b/50b‧‧‧第二驅動感測電路 40b/50b‧‧‧second drive sensing circuit
42a‧‧‧切換及放大電路 42a‧‧‧Switching and amplifying circuit
42b‧‧‧切換及放大電路 42b‧‧‧Switching and amplifying circuit
44a‧‧‧比較器 44a‧‧‧ comparator
44b‧‧‧比較器 44b‧‧‧ comparator
90‧‧‧觸敏式面板或觸控式螢幕 90‧‧‧Touch-sensitive panel or touch screen
100‧‧‧觸控式螢幕控制器/特殊應用積體電路(「ASIC」)或CPU 100‧‧‧Touch Screen Controller/Special Application Integrated Circuit ("ASIC") or CPU
102‧‧‧驅動/感測處理器 102‧‧‧Drive/Sensor Processor
Claims (37)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/792,682 US8766930B2 (en) | 2010-06-02 | 2010-06-02 | Capacitive touchscreen system with drive-sense circuits |
Publications (2)
Publication Number | Publication Date |
---|---|
TW201203071A TW201203071A (en) | 2012-01-16 |
TWI469022B true TWI469022B (en) | 2015-01-11 |
Family
ID=45064093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW100115199A TWI469022B (en) | 2010-06-02 | 2011-04-29 | Capacitive touchscreen system and method for detecting touch on capacitive touchscreen system |
Country Status (2)
Country | Link |
---|---|
US (1) | US8766930B2 (en) |
TW (1) | TWI469022B (en) |
Families Citing this family (90)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8988087B2 (en) | 2011-01-24 | 2015-03-24 | Microsoft Technology Licensing, Llc | Touchscreen testing |
US8725443B2 (en) | 2011-01-24 | 2014-05-13 | Microsoft Corporation | Latency measurement |
US9542092B2 (en) | 2011-02-12 | 2017-01-10 | Microsoft Technology Licensing, Llc | Prediction-based touch contact tracking |
US8982061B2 (en) * | 2011-02-12 | 2015-03-17 | Microsoft Technology Licensing, Llc | Angular contact geometry |
WO2012112707A1 (en) * | 2011-02-15 | 2012-08-23 | Cirque Corporation | Reduction of noise and de-ghosting in a mutual capacitance multi -touch touchpad |
US8773377B2 (en) | 2011-03-04 | 2014-07-08 | Microsoft Corporation | Multi-pass touch contact tracking |
US8913019B2 (en) * | 2011-07-14 | 2014-12-16 | Microsoft Corporation | Multi-finger detection and component resolution |
US9378389B2 (en) | 2011-09-09 | 2016-06-28 | Microsoft Technology Licensing, Llc | Shared item account selection |
US9785281B2 (en) | 2011-11-09 | 2017-10-10 | Microsoft Technology Licensing, Llc. | Acoustic touch sensitive testing |
US8914254B2 (en) | 2012-01-31 | 2014-12-16 | Microsoft Corporation | Latency measurement |
US20130265276A1 (en) | 2012-04-09 | 2013-10-10 | Amazon Technologies, Inc. | Multiple touch sensing modes |
US9317147B2 (en) | 2012-10-24 | 2016-04-19 | Microsoft Technology Licensing, Llc. | Input testing tool |
US8717325B1 (en) | 2013-02-18 | 2014-05-06 | Atmel Corporation | Detecting presence of an object in the vicinity of a touch interface of a device |
CN103336636B (en) * | 2013-06-14 | 2016-12-28 | 业成光电(深圳)有限公司 | Contact panel and touch control display apparatus |
CN103927065B (en) * | 2014-01-27 | 2017-02-15 | 上海中航光电子有限公司 | Touch screen and method for detecting same |
US9354734B2 (en) * | 2014-03-04 | 2016-05-31 | Atmel Corporation | Common-mode hover detection |
US9524697B2 (en) | 2014-09-02 | 2016-12-20 | Stmicroelectronics Asia Pacific Pte Ltd | Capacitive touch screen display system including circuitry to address display perturbations induced by panel sensing |
CN104484120B (en) * | 2014-12-29 | 2018-01-16 | 广东欧珀移动通信有限公司 | The method, device and mobile terminal and leather sheath that screen is lighted |
KR102308851B1 (en) | 2015-01-15 | 2021-10-05 | 삼성디스플레이 주식회사 | Liquid crystal display device and driving method of the same |
US10353516B2 (en) * | 2015-04-24 | 2019-07-16 | Apple Inc. | Merged floating pixels in a touch screen |
US10229304B2 (en) * | 2015-06-05 | 2019-03-12 | Synaptics Incorporated | Finger detection with auto-baseline tracking |
US11269455B1 (en) | 2020-10-23 | 2022-03-08 | Sigmasense, Llc. | Enhanced mutual capacitance touch screen display with noise compensation and methods for use therewith |
US10664098B2 (en) | 2015-06-22 | 2020-05-26 | Sigmasense, Llc. | Channel driver circuit |
US10120498B2 (en) | 2015-06-22 | 2018-11-06 | Sigmasense, Llc. | Multi-touch sensor and electrostatic pen digitizing system utilizing simultaneous functions for improved performance |
US11397492B2 (en) | 2015-06-22 | 2022-07-26 | Sigmasense, Llc. | Enhanced mutual capacitance touch screen display with shape detection and methods for use therewith |
US11907484B2 (en) | 2015-06-22 | 2024-02-20 | Sigmasense, Llc. | Function and orientation identification for input/output (I/O) operative touch sensor device (TSD) |
EP3186694B1 (en) | 2015-07-06 | 2019-08-21 | SigmaSense, LLC | Pen system with internal pressure, tilt and rotation measurement |
CN105224153A (en) * | 2015-08-31 | 2016-01-06 | 京东方科技集团股份有限公司 | The electric property pick-up unit of touch control electrode and detection method |
US20180049671A1 (en) | 2016-08-18 | 2018-02-22 | Timothy W. Markison | Wireless in-shoe physical activity monitoring dongle |
US10838530B2 (en) | 2017-09-15 | 2020-11-17 | Sigmasense, Llc. | Touchscreen display with concurrent touch and display operations |
US11429226B2 (en) | 2018-08-27 | 2022-08-30 | Sigmasense, Llc. | Analog-digital drive sense circuit |
US10895867B2 (en) | 2018-08-27 | 2021-01-19 | Sigmasense, Llc. | Analog world interfacing for automated systems |
US10554215B1 (en) | 2019-03-26 | 2020-02-04 | Sigmasense, Llc. | Analog to digital conversion circuit with very narrow bandpass digital filtering |
US11003205B2 (en) | 2019-02-04 | 2021-05-11 | Sigmasense, Llc. | Receive analog to digital circuit of a low voltage drive circuit data communication system |
US11635396B2 (en) | 2018-08-27 | 2023-04-25 | Sigmasense, Llc. | Sensing device with drive sense circuit and particle sensor and methods for use therewith |
US11914812B2 (en) | 2018-08-27 | 2024-02-27 | Sigmasense, Llc. | Current reference operative drive-sense circuit (DSC) |
US12007421B2 (en) | 2018-08-27 | 2024-06-11 | Sigmasense, Llc. | Load sensing circuit employing sink and sense configuration |
US11644860B2 (en) | 2018-08-27 | 2023-05-09 | Sigmasense, Llc. | Configuring a programmable drive sense unit |
US11099032B2 (en) | 2018-08-27 | 2021-08-24 | Sigmasense, Llc. | Drive sense circuit with drive-sense line |
US11550426B2 (en) | 2018-08-27 | 2023-01-10 | Sigmasense, Llc. | Sensor monitoring system |
US11822358B2 (en) | 2018-08-27 | 2023-11-21 | Sigmasense, Llc. | Drive-sense circuit to determine effects of different electrical characteristics on load |
US11513543B2 (en) | 2018-08-27 | 2022-11-29 | Sigmasense, Llc. | Impedance detect drive sense circuit |
US11789555B2 (en) | 2018-09-14 | 2023-10-17 | Sigmasense, Llc. | Touch sense control circuit with noise suppression |
US11899867B2 (en) | 2018-09-14 | 2024-02-13 | Sigmasense, Llc. | Touch screen display with touchless gestures and methods for use therewith |
US10908718B2 (en) | 2018-09-14 | 2021-02-02 | Sigmasense, Llc. | Large touch screen display with integrated electrodes |
US10845985B2 (en) | 2018-09-14 | 2020-11-24 | Sigmasense, Llc. | Identification in touch systems |
US11875005B2 (en) | 2018-09-14 | 2024-01-16 | Sigmasense, Llc. | Touch screen display with touchless indications and methods for use therewith |
US11372510B2 (en) * | 2018-11-02 | 2022-06-28 | Sigmasense, Llc. | Multi-conductor touch system |
US10935585B2 (en) | 2018-11-19 | 2021-03-02 | Sigmasense, Llc. | Drive sense circuit with transient suppression |
US10852857B2 (en) | 2018-11-19 | 2020-12-01 | Sigmasense, Llc. | Frequency diverse e-pen for touch sensor and e-pen systems |
US10996728B2 (en) | 2019-01-04 | 2021-05-04 | Sigmasense, Llc. | Power supply signal conditioning system based on drive-sense circuit (DSC) processing |
US10915483B2 (en) | 2019-01-14 | 2021-02-09 | Sigmasense, Llc. | Low voltage drive circuit with variable oscillating characteristics and methods for use therewith |
US10884967B2 (en) | 2019-01-14 | 2021-01-05 | Sigmasense, Llc. | Low voltage drive circuit with variable frequency characteristics and methods for use therewith |
US10831690B2 (en) | 2019-01-14 | 2020-11-10 | Sigmasense, Llc. | Channel allocation among low voltage drive circuits |
US11061082B2 (en) | 2019-03-18 | 2021-07-13 | Sigmasense, Llc. | Single line hall effect sensor drive and sense |
US12046214B2 (en) | 2019-03-22 | 2024-07-23 | Sigmasense, Llc. | Display controller with row enable based on drive settle detection |
US11029782B2 (en) | 2019-05-03 | 2021-06-08 | Sigmasense, Llc. | Light emitting diode (LED) touch display circuit |
US11056930B2 (en) | 2019-05-31 | 2021-07-06 | Sigmasense, Llc. | Wireless power transfer and communications |
US11131714B2 (en) | 2019-05-31 | 2021-09-28 | Sigmasense, Llc. | Battery monitoring and characterization during charging |
US10756578B1 (en) | 2019-05-31 | 2020-08-25 | Sigmasense, Llc. | Wireless power transfer with in-line sensing and control |
US11221709B2 (en) | 2019-06-10 | 2022-01-11 | Sigmasense, Llc. | Electronic writing apparatus with ring-back and other functionalities |
US11029769B2 (en) | 2019-06-10 | 2021-06-08 | Sigmasense, Llc. | Pen for use with a touch screen |
US11216133B2 (en) | 2019-06-10 | 2022-01-04 | Sigmasense, Llc. | Device for use with a touch screen |
US11126297B2 (en) | 2019-06-10 | 2021-09-21 | Sigmasense, Llc. | Electronic pen with ring-back and other functionalities |
US11054920B2 (en) | 2019-06-10 | 2021-07-06 | Sigmasense, Llc. | Pen for use with a touch screen |
US11555687B2 (en) | 2019-08-08 | 2023-01-17 | Sigmasense, Llc. | Capacitive imaging glove |
US10976837B2 (en) * | 2019-08-20 | 2021-04-13 | Sigmasense, Llc. | User input passive device for use with an interactive display device |
US10908641B1 (en) | 2019-10-09 | 2021-02-02 | Sigmasense, Llc. | Display generated data transmission from user device to touchscreen via user |
US11133811B2 (en) | 2019-11-08 | 2021-09-28 | Sigmasense, Llc. | High resolution analog to digital converter (ADC) with improved bandwidth |
US11190205B2 (en) | 2019-11-08 | 2021-11-30 | Sigmasense, Llc. | Single-ended direct interface dual DAC feedback photo-diode sensor |
US11935397B2 (en) | 2019-12-30 | 2024-03-19 | Sigmasense, Llc. | Organic and inorganic test system |
US11216109B2 (en) | 2020-01-07 | 2022-01-04 | Sigmasense, Llc. | Drive-sense control for extended sensor panels |
US11221704B2 (en) | 2020-02-05 | 2022-01-11 | Sigmasense, Llc. | Screen-to-screen communication via touch sense elements |
US11079888B1 (en) | 2020-02-18 | 2021-08-03 | Sigmasense, Llc. | Sensitivity region of interest processing (ROIP) for input/output (I/O) operative touch sensor device (TSD) |
US11144160B1 (en) | 2020-03-30 | 2021-10-12 | Sigmasense, Llc. | Three-dimensional data reduction method and system |
US11182038B2 (en) | 2020-04-08 | 2021-11-23 | Sigmasense, Llc. | Encoded data pattern touchscreen sensing system |
US11340995B2 (en) | 2020-05-21 | 2022-05-24 | Sigmasense, Llc. | Integrated circuit with programmable input/output module |
US11504535B2 (en) | 2020-06-03 | 2022-11-22 | Sigmasense, Llc. | Pacemaker operative to deliver impulses of pace signal and sense cardiac response via single conductor of pacemaker lead |
US11304002B2 (en) | 2020-08-12 | 2022-04-12 | Sigmasense, Llc. | Single transducer audio in/out device |
US11374587B1 (en) | 2021-02-25 | 2022-06-28 | Sigmasense, Llc. | Batteryless wireless sensor system |
US20220342513A1 (en) | 2021-04-23 | 2022-10-27 | Sigmasense, Llc. | Processing z-direction pressure indication of a passive pen |
US11575851B2 (en) | 2021-05-28 | 2023-02-07 | Sigmasense, Llc. | Handheld communication device with drive-sense circuit based imaging array and methods for use therewith |
US11575850B2 (en) | 2021-05-28 | 2023-02-07 | Sigmasense, Llc. | Imaging device with drive-sense circuit(s) and methods for use therewith |
US11977123B2 (en) | 2021-06-01 | 2024-05-07 | Sigmasense, Llc. | Sensing voltage using micro-watt sensor |
US11679678B2 (en) | 2021-06-28 | 2023-06-20 | Sigmasense, Llc. | Vehicle system for detecting and visually conveying vehicle button interaction |
US11556298B1 (en) * | 2021-07-30 | 2023-01-17 | Sigmasense, Llc | Generation and communication of user notation data via an interactive display device |
US11592874B1 (en) | 2021-08-04 | 2023-02-28 | Sigmasense, Llc. | Touch sensing in a flexible/foldable touch screen display |
US11797139B2 (en) | 2021-09-21 | 2023-10-24 | Sigmasense, Llc. | Fingerprint scanning device incorporating drive-sense circuitry |
US11709563B2 (en) | 2021-10-26 | 2023-07-25 | Sigmasense, Llc. | Touch-based device with interlaced electrode grids |
US11740752B1 (en) | 2022-07-13 | 2023-08-29 | Sigmasense, Llc. | Device with signal generator |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5914710A (en) * | 1997-08-20 | 1999-06-22 | Ace Cad Enterprise Co., Ltd. | Cordless pointing instrument for graphics tablet |
US20090295754A1 (en) * | 2008-06-03 | 2009-12-03 | Himax Technologies Limited | Touch panel |
TW201013494A (en) * | 2008-09-23 | 2010-04-01 | Holtek Semiconductor Inc | Sensing device and method for touch panel |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5543588A (en) * | 1992-06-08 | 1996-08-06 | Synaptics, Incorporated | Touch pad driven handheld computing device |
US6249606B1 (en) * | 1998-02-19 | 2001-06-19 | Mindmaker, Inc. | Method and system for gesture category recognition and training using a feature vector |
US7154481B2 (en) | 2002-06-25 | 2006-12-26 | 3M Innovative Properties Company | Touch sensor |
US7868874B2 (en) * | 2005-11-15 | 2011-01-11 | Synaptics Incorporated | Methods and systems for detecting a position-based attribute of an object using digital codes |
TWI444876B (en) | 2007-04-05 | 2014-07-11 | Qrg Ltd | Two-dimensional position sensor |
CN101681223A (en) | 2007-05-07 | 2010-03-24 | 爱特梅尔公司 | Two-dimensional position sensor |
WO2009007704A1 (en) | 2007-07-12 | 2009-01-15 | Qrg Limited | Two-dimensional touch panel |
JP5476368B2 (en) * | 2008-04-30 | 2014-04-23 | エヌ−トリグ リミテッド | Multi-touch detection |
US20100026655A1 (en) | 2008-07-31 | 2010-02-04 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Capacitive Touchscreen or Touchpad for Finger or Stylus |
US8711121B2 (en) * | 2008-12-12 | 2014-04-29 | Wacom Co., Ltd. | Architecture and method for multi-aspect touchscreen scanning |
JP5164930B2 (en) * | 2009-06-05 | 2013-03-21 | 株式会社ジャパンディスプレイウェスト | Touch panel, display panel, and display device |
TWI395125B (en) * | 2009-07-14 | 2013-05-01 | Sonix Technology Co Ltd | Capacitive touch sensing circuit |
-
2010
- 2010-06-02 US US12/792,682 patent/US8766930B2/en active Active
-
2011
- 2011-04-29 TW TW100115199A patent/TWI469022B/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5914710A (en) * | 1997-08-20 | 1999-06-22 | Ace Cad Enterprise Co., Ltd. | Cordless pointing instrument for graphics tablet |
US20090295754A1 (en) * | 2008-06-03 | 2009-12-03 | Himax Technologies Limited | Touch panel |
TW201013494A (en) * | 2008-09-23 | 2010-04-01 | Holtek Semiconductor Inc | Sensing device and method for touch panel |
Also Published As
Publication number | Publication date |
---|---|
US20110298745A1 (en) | 2011-12-08 |
TW201203071A (en) | 2012-01-16 |
US8766930B2 (en) | 2014-07-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI469022B (en) | Capacitive touchscreen system and method for detecting touch on capacitive touchscreen system | |
US8692781B2 (en) | Capacitive touchscreen system with multiplexers | |
US10031632B2 (en) | Pseudo driven shield | |
US9310940B2 (en) | Capacitive touchscreen or touch panel with fingerprint reader | |
US8395599B2 (en) | Low voltage capacitive touchscreen charge acquisition and readout systems, circuits and methods for high system noise immunity | |
JP6335313B2 (en) | Detection and identification of touches of different sized conductive objects on capacitive buttons | |
US8797294B2 (en) | Capacitive touchscreen system with switchable charge acquisition circuit | |
US8566955B2 (en) | User indentification with capacitive touchscreen | |
US8508493B2 (en) | Reduction of electromagnetic interference in a capacitive touchscreen system | |
US8274491B2 (en) | Capacitive touchscreen signal acquisition without panel reset | |
US8803839B2 (en) | Capacitive coupling of a capacitive touchscreen to a printed circuit and controller | |
US8508502B2 (en) | Capacitive touchscreen system with touch position encoding during analog-to-digital conversion | |
US20150002176A1 (en) | Touch sensing device and touchscreen apparatus | |
US20120182225A1 (en) | Detection of Predetermined Objects with Capacitive Touchscreens or Touch Panels | |
US20120182252A1 (en) | Differential Capacitive Touchscreen or Touch Panel | |
TWI789297B (en) | Applying a signal to a touch sensor | |
US20120105354A1 (en) | Tactile Feedback Cover Lens for a Capacitive Touchscreen System | |
US9891774B2 (en) | Touch noise canceling for dot-inversion driving scheme | |
WO2014025723A1 (en) | Electrode configuration for large touch screen | |
CN109669585B (en) | Capacitive touch sensing that can determine conductivity type | |
US9507454B1 (en) | Enhanced linearity of gestures on a touch-sensitive surface | |
CN107315450B (en) | Touch screen controller for determining a relationship between a user's hand and a housing of an electronic device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |